Process for the manufacture of granular urea-aldehyde fertilizer
First Claim
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1. IN A PROCESS FOR THE MANUFACTURE OF FERTILIZERS BY CONDENSING UREA AND AN ALDEHYDE HAVING THREE TO FOUR CARBON ATOMS WITH THE EXCLUSION OF A SOLVENT, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE STARTING PRODUCTS, PRIOR TO THE CONDENSATION, A SWELLABLE SUBSTANCE OF MEDIUM- TO HIGH-MOLECULAR WEIGHT IN AN AMOUNT OF FROM 0.2 TO 5 PERCENT BY WEIGHT OF THE FINAL PRODUCT.
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1 Claim
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1. IN A PROCESS FOR THE MANUFACTURE OF FERTILIZERS BY CONDENSING UREA AND AN ALDEHYDE HAVING THREE TO FOUR CARBON ATOMS WITH THE EXCLUSION OF A SOLVENT, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE STARTING PRODUCTS, PRIOR TO THE CONDENSATION, A SWELLABLE SUBSTANCE OF MEDIUM- TO HIGH-MOLECULAR WEIGHT IN AN AMOUNT OF FROM 0.2 TO 5 PERCENT BY WEIGHT OF THE FINAL PRODUCT.
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Current AssigneeKarl Schafer Helmut, Wilhelm Krause Paul
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Original AssigneeKarl Schafer Helmut, Wilhelm Krause Paul
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InventorsKARL SCHAFER HELMUT, WILHELM KRAUSE PAUL
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Application NumberUS04/381,922Time in Patent Office1,075 DaysField of SearchUS Class Current71/28CPC Class CodesC05C 9/02 containing urea-formaldehyd...
